swift: [Xcode 14.3] Can't build project when setting SWIFT_OPTIMIZATION_LEVEL as [-O]

Description I’m encountering problems while building the release version of my project. The debug version builds fine using the -Onone option, but when I try to build the release version using the -O option, I’m running into issues.

Specifically, there are a couple of Swift files that cannot be built with the -O option, such as those containing extension URL. I’m unsure of how to resolve this issue and would appreciate any advice or guidance on how to proceed.

Steps to reproduce

URL+Extension.swift <- can’t build

extension URL {
    var queryDictionary: [String: String]? {
        var dic = [String: String]()
        if let items = URLComponents(string: absoluteString)?.queryItems {
            for item in items {
                if let value = item.value {
                    dic[item.name] = value
                }
            }
        }
        return dic.isEmpty ? nil : dic
    }
}

log

4.	While evaluating request ExecuteSILPipelineRequest(Run pipelines { PrepareOptimizationPasses, EarlyModulePasses, HighLevel,Function+EarlyLoopOpt, HighLevel,Module+StackPromote, MidLevel,Function, ClosureSpecialize, LowLevel,Function, LateLoopOpt, SIL Debug Info Generator } on SIL for NinetyNine)
5.	While running pass #17357670 SILModuleTransform "DeadFunctionAndGlobalElimination".
Stack dump without symbol names (ensure you have llvm-symbolizer in your PATH or set the environment var `LLVM_SYMBOLIZER_PATH` to point to it):
0  swift-frontend           0x0000000107b23300 llvm::sys::PrintStackTrace(llvm::raw_ostream&, int) + 56
1  swift-frontend           0x0000000107b222e4 llvm::sys::RunSignalHandlers() + 112
2  swift-frontend           0x0000000107b23910 SignalHandler(int) + 344
3  libsystem_platform.dylib 0x000000018aeeea84 _sigtramp + 56
4  swift-frontend           0x000000010325f65c (anonymous namespace)::DeadFunctionAndGlobalEliminationPass::run() + 424
5  swift-frontend           0x000000010325f65c (anonymous namespace)::DeadFunctionAndGlobalEliminationPass::run() + 424
6  swift-frontend           0x00000001033c54a0 swift::SILPassManager::executePassPipelinePlan(swift::SILPassPipelinePlan const&) + 15312
7  swift-frontend           0x00000001033e6a04 swift::SimpleRequest<swift::ExecuteSILPipelineRequest, std::__1::tuple<> (swift::SILPipelineExecutionDescriptor), (swift::RequestFlags)1>::evaluateRequest(swift::ExecuteSILPipelineRequest const&, swift::Evaluator&) + 56
8  swift-frontend           0x00000001033ccdd4 llvm::Expected<swift::ExecuteSILPipelineRequest::OutputType> swift::Evaluator::getResultUncached<swift::ExecuteSILPipelineRequest>(swift::ExecuteSILPipelineRequest const&) + 484
9  swift-frontend           0x00000001033cf714 swift::runSILOptimizationPasses(swift::SILModule&) + 400
10 swift-frontend           0x0000000102badc10 swift::CompilerInstance::performSILProcessing(swift::SILModule*) + 524
11 swift-frontend           0x0000000102a1151c performCompileStepsPostSILGen(swift::CompilerInstance&, std::__1::unique_ptr<swift::SILModule, std::__1::default_delete<swift::SILModule> >, llvm::PointerUnion<swift::ModuleDecl*, swift::SourceFile*>, swift::PrimarySpecificPaths const&, int&, swift::FrontendObserver*) + 1040
12 swift-frontend           0x0000000102a14ab8 performCompile(swift::CompilerInstance&, int&, swift::FrontendObserver*) + 3288
13 swift-frontend           0x0000000102a12944 swift::performFrontend(llvm::ArrayRef<char const*>, char const*, void*, swift::FrontendObserver*) + 4308
14 swift-frontend           0x00000001029d768c swift::mainEntry(int, char const**) + 4116
15 dyld                     0x000000018ab67f28 start + 2236

Xcode 14.2 was working fine.

Expected behavior Build success

Screenshots

Environment

• Swift compiler version: 5.8
• Xcode version: 14.3
• Deployment target: iOS 14.0